 In July, a British infantry battalion, led by Lt. Col. Colin Mitchell of the Argyll and Sutherland Highlanders, entered the Crater and managed to occupy the entire district overnight with no casualties.Nevertheless, deadly guerrilla attacks soon resumed, with the British leaving Aden by the end of November 1967, earlier than had been planned by British prime minister Harold Wilson and without an agreement on the succeeding governance.Crater's climate is dominated all year by the subtropical anticyclone, or subtropical high, with its descending air, elevated inversions and clear skies.